{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "GBE has been traditionally used as a platelet activating factor , a circulatory stimulant , a tonic , and anti - asthmatic drug , and anti - cancer agent . However , anti - cancer effects of GBE on ER - negative breast cancer have not been proved yet ."}
{"Chemical": []}